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Bimetallic NiCoP catalysts anchored on phosphorus-doped lignin-based carbon for robust oxygen evolution performance

Rare Metals 2024年第7期43卷 3084-3095页

作者： Ling-Ying-Zi Xiong Bo-Wen Liu Lei Du Yue-Kuan Zhou Xu-Liang Lin Huan Wang Guangdong Engineering Technology Research Center for Sensing Materials & Devices Guangzhou Key Laboratory of Sensing Materials & DevicesSchool of Chemistry and Chemical EngineeringGuangzhou University School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Sustainable Energy and Environment Thrust Function HubThe Hong Kong University of Science and Technology (Guangzhou) Division of Emerging Interdisciplinary Areas Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and Technology State Key Lab of Pulp and Paper Engineering South China University of Technology

Oxygen evolution reaction（OER） catalysts are the key core materials that determine the performance of fuel cells,metal-air batteries,electrolytic water decomposition,and other *** this work,a green lignin-based non-precious metal OER catalyst was prepared by a simple ***,c arboxylated lignin was used to complex Ni and Co in situ,and then they were placed with sodium hypophosphite in the same tube furnace for upstream and downstream high-temperature calcination to construct a lignin carbon-based Ni-Co bimetallic OER catalyst（NiCoP@C）.The synthesized catalyst is a porous bimetallic phosphide with a three-dimensional network structure and high-density electrochemical active ***@C exhibited favorable catalytic activity for the oxygen evolution reaction（OER） with overpotential of 280 mV at 10 mA·cm-2and a Tafel slope of 77 mV·***,it exhibited remarkable durability during *** functional theory（DFT） calculations revealed that by leveraging the distinctive structure of transition metal phosphide nanoparticles incorporated into a reticulated substrate,the NiCoP@C catalyst offered an increased number of active sites for OER catalysis,significantly enhancing its stability during practical *** present study broadens the utilization pathways of biomass to "turn waste into treasure," aligning the development concept of green sustainable development.

关键词： Oxygen evolution reaction Lignin carbon-based catalyst Nickel–cobalt bimetal Metal phosphide

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Non-precious metal electrocatalysts for two-electron oxygen electrochemistry: Mechanisms, progress, and outlooks

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Journal of Energy Chemistry 2022年第6期31卷 54-69,I0003页

作者： Yuhan Wu Jianhui Sun Shixue Dou Jingyu Sun School of Environment Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control-Ministry of EducationHenan Normal UniversityXinxiang 453007HenanChina College of Energy Soochow Institute for Energy and Materials InnovationsKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006JiangsuChina Institute for Superconducting and Electronic Materials University of WollongongWollongongNSW 2522Australia

Hydrogen peroxide (H_(2)O_(2)) is a valuable chemical for a wide variety of applications. The environmentally friendly production route of the electrochemical reduction of O_(2)to H_(2)O_(2) has become an attractive alternative to the traditional anthraquinone process. The efficiency of electrosynthesis process depends considerably on the availability of cost-effective catalysts with high selectivity, activity, and ***, there are many outstanding issues in the preparation of highly selective catalysts, the exploration of the interface electrolysis environment, and the construction of electrolysis devices, which have led to extensive research efforts. Distinct from the existing few comprehensive review articles on H_(2)O_(2) production by two-electron oxygen reduction, the present review first explains the principle of the oxygen reduction reaction and then highlights recent advances in the regulation and control strategies of different types of catalysts. Key factors of electrode structure and device design are discussed. In addition,we highlight the promising co-production combination of this system with renewable energy or energy storage systems. This review can help introduce the potential of oxygen reduction electrochemical production of high-flux H_(2)O_(2) to the commercial market.

关键词： 2e-ORR(oxygen reduction reaction) H_(2)O_(2) Heteroatom doping Single atom carbon-based catalyst

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Facile synthesis of a Ni_(3)S_(2)@C composite using cation exchange resin as an efficient catalyst to improve the kinetic properties of MgH_(2)

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Journal of Magnesium and Alloys 2022年第12期10卷 3628-3640页

作者： Liang Zeng Zhiqiang Lan Baobao Li Huiren Liang Xiaobin Wen Xiantun Huang Jun Tan Haizhen Liu Wenzheng Zhou Jin Guo Guangxi Novel Battery Materials Research Center of Engineering Technology Guangxi Colleges and Universities Key Laboratory of Novel Energy Materials and Related TechnologySchool of Physical Science and TechnologyGuangxi UniversityNanning530004PR China School of Materials Science and Engineering Baise UniversityBaise533000PR China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing400044PR China

carbon materials have excellent catalytic effects on the hydrogen storage performance of MgH2. Here, carbon-supported Ni3S2(denoted as Ni3S2@C) was synthesized by a facile chemical route using ion exchange resin and nickel acetate tetrahydrate as raw materials and then introduced to improve the hydrogen storage properties of MgH2. The results indicated the addition of 10 wt.% Ni3S2@C prepared by macroporous ion exchange resin can effectively improve the hydrogenation/dehydrogenation kinetic properties of MgH2. At 100 ℃,the dehydrogenated MgH2-Ni3S2@C-4 composite could absorb 5.68 wt.% H2. Additionally, the rehydrogenated MgH2-Ni3S2@C-4 sample could release 6.35 wt.% H2at 275 ℃. The dehydrogenation/hydrogenation enthalpy changes of MgH2-Ni3S2@C-4 were calculated to be 78.5 k J mol-1/-74.7 k J mol-1, i.e., 11.0 k J mol-1/7.3 k J mol-1lower than those of MgH2. The improvement in the kinetic properties of MgH2was ascribed to the multi-phase catalytic action of C, Mg2Ni, and Mg S, which were formed by the reaction between Ni3S2contained in the Ni3S2@C catalyst and Mg during the first hydrogen absorption–desorption process.

关键词： Magnesium Hydrogen storage performance Catalytic effect carbon-based catalyst

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Co_(3)O_(4)/Mn_(3)O_(4) hybrid catalysts with heterointerfaces as bifunctional catalysts for Zn-air batteries

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Journal of Energy Chemistry 2022年第5期31卷 679-687页

作者： Qikai Huang Xiongwei Zhong Qi Zhang Xin Wu Miaolun Jiao Biao Chen Jinzhi Sheng Guangmin Zhou Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute&Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055GuangdongChina

Zinc-air batteries(ZABs) with high energy density and safety are promising as next-generation energy storage systems, while their applications are severely hindered by the sluggish reaction kinetic of air cathodes. Developing a bifunctional catalyst with high activity and durability is an effective strategy to address the above challenges. Herein, a Co_(3)O_(4)/Mn_(3)O_(4) nanohybrid with heterointerfaces is designed as advanced cathode catalyst for ZABs. Density functional theory calculations show the heterogeneous interface between Co_(3)O_(4)/Mn_(3)O_(4) can improve the dynamics of carrier transport and thus enhancing the catalytic activity and durability. The Co_(3)O_(4)/Mn_(3)O_(4) catalyst anchored on reduced graphene oxide(rGO)exhibits high oxygen reduction reaction(ORR) activity with a half-wave potential of 0.86 V, and excellent oxygen evolution reaction(OER) activity with the potential of 1.59 V at 10 mA cm^(-2) , which are comparable to the commercial noble metal catalysts. The improved ORR/OER catalytic activity is ascribed to the synergistic effect of heterointerfaces between Co_(3)O_(4) and Mn_(3)O_(4)as well as the improved conductivity and contact area of oxygen/catalysts/electrolytes three-phase interface by r GO. Furthermore, a home-made ZAB based on Co_(3)O_(4)/Mn_(3)O_(4)/r GO shows a high open circuit voltage of 1.54 V, a large power density of 194.6 mW cm^(-2) and good long-term cycling stability of nearly 400 h at 5 mA cm^(-2) , which affords a promising bifunctional oxygen catalyst for rechargeable ZABs.

关键词： Transition metal oxide carbon-based catalyst Heterointerfaces Bifunctional catalyst Zn-air batteries

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One-step synthesis of N,P co-doped porous carbon electrocatalyst for highly efficient nitrogen fixation

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Nano Research 2022年第3期15卷 1779-1785页

作者： Sijia Zhao Jin Wang Peng Wang Shuang Wang Jinping Li College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

Heteroatom-doped porous carbon has attracted many researchers’interests owing to their hierarchical porous and more active sites for nitrogen reduction reaction(NRR).However,the development of simple synthesis strategies to fabricate efficient catalyst is still remaining a *** this work,a series of N,P co-doped porous carbon were prepared by one-step pyrolysis of zeolitic imidazolate framework(ZIF-8)and triphenylphosphine(TPP)under nitrogen *** obtained catalyst by calcinating ZIF-8 and TPP with the mass ratio of 1:5 for three hours was named as PN-C-ZIF-8,which exhibited a high yield rate of ammonia(43.39μg·h^(–1)·mg^(–1)cat.)and Faraday efficiency(16.67%)in 0.05 M H2SO4 at–0.3 *** importantly,the PN-C-ZIF-8 catalyst had superior selectivity that no hydrazine by-products were detected and long-term durability for 72 *** study provides an idea for the convenient design and preparation of heteroatom doped carbon materials.

关键词： N P co-doped carbon-based catalyst electrochemical ammonia synthesis metal organic framework pyrolysis

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Covalent Organic Frameworks based Single-site Electrocatalysts for Oxygen Reduction Reaction

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Chemical Research in Chinese Universities 2022年第5期38卷 1151-1162页

作者： BU Ran LU Yingying ZHANG Bing State Key Laboratory of Chemical Engineering Institute of Pharmaceutical EngineeringCollege of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027P.R.China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311200P.R.China

Single site catalysts(SSCs)are a new type of heterogeneous catalysts formed by isolated metal atoms supported on kinds of *** have shown great potential for energy conversion and storage in recent years,especially for oxygen reduction reactions(ORR).Typically,SSCs are confined on the substrate by strong chemical interactions,such as coordination ***,the surface chemical environment and porous properties of the supports are crucial to the performance of *** recent years,COFs have become excellent candidates for preparing SSCs as they can precisely assemble monomers into highly ordered crystalline porous materials with a fine structure and definite *** this review,we not only summarize the characteristics and advantages of COFs based SSCs,but also highlight the applications of COFs constructed from different single active sites for ORR in recent ***,challenges in practical application,feasible strategies and perspectives are proposed for the of COFs based SSCs.

关键词： Covalent organic framework Oxygen reduction reaction Single site catalyst Energy conversion carbon-based catalyst

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Intrinsic defects in biomass-derived carbons facilitate electroreduction of CO2

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Nano Research 2020年第3期13卷 729-735页

作者： Mengjie Chen Shuai Wang Haiyan Zhang Ping Zhang Ziqi Tian Min Lu Xiaoji Xie Ling Huang Wei Huang Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing211816China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo315201China Shaanxi Institute of Flexible Electronics Northwestern Polytechnical UniversityXi’an710072China

Developing efficient carbon-based metal-free electrocatalysts can bridge the gap between laboratory studies and practical applications of CO2 ***,along with the ambiguous understanding of the active sites in carbon-based electrocatalysts,carbon-based electrocatalysts with high selectivity and satisfactory stability for electroreduction of CO2 remain ***,using the nitrogen rich silk cocoon as a precursor,carbon-based electrocatalysts with intrinsic defects can be prepared for efficient and long-term electroreduction of CO2 by a simple two-step *** obtained electrocatalyst can catalyze CO2 reduction to CO with a Faradaic efficiency of^89%and maintain good selectivity for about 10 ***,our experimental studies suggest that in-plane defects are the main active sites on which the rate-determining step for CO2 reduction should be the direct electron transfer to CO2 but not the proton-coupled electron *** theoretical calculations consistently demonstrate that the intrinsic defects in carbon matrix,particularly the pentagon-containing defects,act as main active sites to accelerate the direct electron transfer for CO2 *** addition,our synthetic approach can convert egg white into efficient catalysts for CO2 *** findings,providing new insights into the biomass-derived catalysts,should pave the way for fabricating efficient and stable carbon-based electrocatalysts with catalytically active defects by using naturally abundant precursors.

关键词： carbon dioxide reduction carbon-based catalyst defect biomass

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